There are three buttons on the toolbar that you would use. The first one, which consists of a bolded 'b', is the button you would use for bolding letters/words/symbols. The second consists of an italicized 'i'. This is the button you would yuse if you were to italicize letters/words/symbols. The third consists of an 'abc' that has been sticken through. If you wanted to type words with either of or any combination of those characteristics, you would click on the button that corresponds to the characteristics you wish your letters to be.

When you don't want the text to look like that anymore, simply click the button you originally clicked again.

For a blockquote, there is a button with a quotation mark (") on it. You would click this button and write whatever it is you need to write with a blockquote. To end the blockquote, you would click the button again.